CDI Gy6 125-150cc Rev Box can be used on Dirt Bikes, Atv's, Quads and most Scooters. This has a no Rev limit racing capacitor discharge ignition CDI module for 125cc nad 150cc scoters, pitbikes, atv's, and go-karts. This high performance CDI module is designed for use on GY6/QMB139 Honda-style Chinese made engines. This will increase your acceleration and performance with a simple "plug and play" switch of your CDI. Compatibility is based on matching wiring and connectors. Please ensure your make and model has the same connectors and number of pins prior to ordering.